John geloso



June 23, 1931.

J. .GELOSO TELEVISION DEVICE l Filed Deo. 24, 1928 .M HIHW" Ilmmlllz;

f2/'ogy' 2.

i Illll lNvENT R engage a friction disc integral with or gearedy Patented June 23, 1931 Y UNITED STATES PATENT OFFICE JOHN GELOSO, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0 PILOT RADIO @c TUBE CORPORATION, OF BROOKLYN, NEW YORK, A CORPORATION OF DELA- WARE f TELEVISION- DEVICE Application led December 24, 1928. Serial No. 328,076.

inventionrelates to television appara- `tus, V'and more specifically toa speed drive for a scanning disc, employed in such apparatus. 4Itfisfa'n objectjof the present invention to provide a driving mechanism for scanning Vdiscs whereby the speeds of such discs may be easily and accurately controlled and the same rapidly brought to synchronization.

It is a further object of the present invention to provide a mechanism of the above indicated character, which is easily manipulated, is simple in construction and is inexpensive to manufacture.

My invention comprises broadly a driving mechanism in the form of an electric motor, having a friction element, upon its armature shaft, the friction element being adapted to to the scanning disc. The motor is mounted upon a carriage which is movable parallel to the plane of the friction disc so that the friction element on the motor shaft will env gage the friction disc at dierent distances from the center of such disc to vary the speed 7 ofthe same.

In the accompanying drawings which,

1, is a rear elevation partly broken away, and i incontact with the plate 11, by means of springs 32,:coiled about pins 33, extending showing parts in section; and Figure 2, is a plan view of the apparatus.

Figure 1, shows a television receiving ap paratus, comprising a casing or cabinet 10,

of any suitable construction and having a` horizontal plate 11, yattached to the sides thereof and supported by uprights 12 and 13.

Bearings 14: are Xed upon the plate 11 and are adapted to support a shaft 15, upon which av scanning disc 16 is mounted, the latter extending through a slot 17, in the plate.

parallel to the plane of the disc 16. In the embodiment illustrated, the carriage is arranged to slide upon the top surface of the plate 11, and is provided with bushings 21, fixed thereto and threaded to receive a 'plate 11. The rod is provided with a lnurled thumbwheel25, for actuating the same.

The armature shaft 26 ofthe motor v19, is

provided with a lfriction elementf27, in the form of a leather or rubber disc, between metal .clamping elements, the outer periphery of which disc is' adapted to Contact a friction "disc 28, of suitable materiahjv'lhedisc 28 may be integral with lthe disc 16, as shown,

or it may be separate therefrom and mounted on the same shaft as the disc 16, orit may be geared to the latter in any suitable way, g The thrust ofthe friction element- 27,j against the disc 16,7may be taken up by a spring 29, surrounding the shaft 15, and bearing against a washerSO, abutting against ther adjustable nut 3l, threaded onto the shaft. The Vmotor is preferably so positioned that itsshaft is at an angle to the plane of the scanning disc, so that friction elements 27, of smaller diameter than the inotormay be employed.

The carriage 20, is so guided and held in position bynieans of the bushings 21, which fit: closely in tne slot 24, and is resiliently held downwardly from the bushings 21, the

springs acting against washers 34.-, loose on said pins and engaging the underside ofthe plate 1v1, 'and against washer 35, adjustably positioned on said pins by means of'nuts 36.

The operation'of my improved apparatus will be vclear from the above. Upon rotating the wheel 25, the bushings will be caused to n t u 2 A neon lamp 181 is mounted m the Casmg, travel along the screw rod 2 so that the friction element 27, will engage the friction disc 28, at different distances from the center of such disc, so that the speed of thelatter will be quickly and easily varied to bring it to synchronization with the scanning disc at thesending or broadcasting station.

,It isr obvious,` that various changes and vmodifications may be made to the details of vconstruction without departing from the genmotor having anl armature shaft, a friction element on said shaft adapted to engage saidv disc to drive the same, said shaft being posi- Y tioned at an angle to the plane of said disc, a

Y'carriage for Lsupporting said motor, and

v means for moving said carriage ina direction parallel to the plane of said disc.

8. The combination of a scanning disc, a

1 motor having an armature shaft, a friction element on said shaft adapted to engage saidscanning disc whereby continuous contact between said disc and friction element is maintained. Y

7. The combination of a scanning disc, a friction disc, connected thereto, a motor having an 'armature' shaft, a friction element on said shaft adapted to engage said friction 4disc to effect rotation of said scanning disc, and means for movingfsaid friction element 'toward andl 'away from tliecenter of'said friction disc to vary the speed of thesame. 8. The combination of a scanning disc, a

friction disc integral therewith, a motor havingan ,armature shaft, a friction element on said shafty adapted to engage said friction disc Vto eect rotation of said scanning disc, and means for'movin'g said friction element Vtoward and 'away from the centertof said friction discv to vary the speed ,of the same.

JOHN GELOSO.

disc to drive the same, a carriage-forsup- 1' porting said motor, andv means formoving said' carriagefin a' Adirection parallel to the plane'bf fsaid disc, `Vsaid means including a threaded lbushing connected to said carriage,

a rotatable screwI rod engaging said vbushing -and'means'for holding said rod against axial movement. e f n y l f4; The combination of a scanning disc, a

motoriliaving an`v armature shaft, a friction element on said shaft adaptedfto engage said disc to' drive the-"same, acarriage for sup 'porting said motor, and means" for moving said carriage in al direction'parallel to the plane of' said disc, said--means including a jplate for supporting saidcarriagaa threaded bushing connected to said carriage, a rotatablescrew rod engaging saidrbushing, ymeans V.for holding saidjrod against axial movement, and resilientimeans for ur'ging'said carriage toward said plate.L Y i 5. The combination ofascanning'dis'c, a

motor having an armature shaft, a friction f element on said shaft adapted to engage said disck to drive thel same, a carriage for supporting said motor, and means for moving' 'said rcarriage in a direction parallell to 'the plane jof said disc, 'said means including a 'plate for supporting said carriage, a. threaded bushi-ng'connectedto said carriage, a'ro- ,itatable screw rodV Aengaging said bushing, Y VVmeans for holding said rod against 'axial .movement and resilient means, including a 1pin rigid with said bushing and a spring coiled about said pinv and acting against said plateandagainst an abutment on said pin, for urging saidcarriage toward said platef 6. The combination-of a scanning disc, a motor liavingvanarmature shaft, a friction element on said shaft adapted to engage said ,Y disc to drive the same, said clement being movable toward and Laway fro'mthe center of sind disc,l means'forso moving saidlelement, 'and meansfor absorbing' thef 'thrust on said 

